This is not a Thunder Tiger, theirs has a gearbox, not a belt drive. I like this one better, more possibilities.
here is a pic to a thunder Tiger for comparison
Looking at both, i see some nice features on both. Independent suspension on the TT makes it easier to setup, The solid axle on the HK makes it more durable and stable. The gearbox in the TT probably has a diff, easier to drive. Solid axle, no diff, so either pushy or twichy depending on tires. Personally i like the HK one, CF and alumnium everywhere and the solid axle make it a better racer, My opinion